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Switch CI from Buildkite to GitHub Actions - #106

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Switch CI from Buildkite to GitHub Actions#106
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@gbaraldi

@gbaraldi gbaraldi commented Aug 5, 2026

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Ports the benchmark pipeline to GitHub-hosted runners using the open-source Julia actions (julia-actions/setup-julia@v2, julia-actions/cache@v2), replacing the Buildkite pipeline that ran on the private juliaecosystem queue.

Carried over unchanged from the Buildkite matrix:

  • nightly × {serial, multithreaded} × all, plus the slow/bigint adjustment
  • the 60-minute timeout and the [skip tests] commit-message escape hatch
  • results.csv uploaded as an artifact per matrix entry (named results-<version>-<benchmark>-<category>)

Additions that come free with GHA: pull_request triggers (Buildkite only ran on push), per-ref concurrency cancellation, and the Julia depot cache between runs.

One honest caveat for reviewers: GitHub-hosted runners are shared 4-vCPU VMs, so timing numbers will be noisier than on the Buildkite fleet — this CI is best read as a does-it-run/regression smoke check, with real measurements still done on dedicated hardware.

Disclosure: this PR was written with the assistance of generative AI (Claude).

🤖 Generated with Claude Code

Port the benchmark pipeline to GitHub-hosted runners using the open-source
Julia actions (julia-actions/setup-julia, julia-actions/cache), replacing
the Buildkite pipeline that ran on the private juliaecosystem queue. The
matrix (nightly x serial/multithreaded/all plus slow/bigint), the 60-minute
timeout, the [skip tests] escape hatch and the results.csv artifact are
carried over unchanged.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CRecnQX4hRN8ecrgHytLHT
@gbaraldi

gbaraldi commented Aug 5, 2026

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Note for merging: GitHub Actions appears to be disabled for this repository (no workflows register and the head commit gets zero check runs — only Buildkite responded to the PR). A repo/org admin needs to enable it under Settings → Actions → General before or when this merges, or the new workflow will silently never run.

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